20919033 has 8 divisors (see below), whose sum is σ = 30991200. Its totient is φ = 13946004.

The previous prime is 20919011. The next prime is 20919037. The reversal of 20919033 is 33091902.

It is not a de Polignac number, because 20919033 - 2⁵ = 20919001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 774779 = 20919033 / (2 + 0 + 9 + 1 + 9 + 0 + 3 + 3).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20918988 and 20919006.

It is not an unprimeable number, because it can be changed into a prime (20919037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 387363 + ... + 387416.

It is an arithmetic number, because the mean of its divisors is an integer number (3873900).

Almost surely, 2^20919033 is an apocalyptic number.

It is an amenable number.

20919033 is a deficient number, since it is larger than the sum of its proper divisors (10072167).

20919033 is an equidigital number, since it uses as much as digits as its factorization.

20919033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774788 (or 774782 counting only the distinct ones).

The product of its (nonzero) digits is 1458, while the sum is 27.

The square root of 20919033 is about 4573.7329392959. The cubic root of 20919033 is about 275.5373866564.

The spelling of 20919033 in words is "twenty million, nine hundred nineteen thousand, thirty-three".